follow activity for turreted attacks

OpenRa.Game/OpenRa.Game.csproj

@@ -83,7 +83,7 @@
     <Compile Include="Stopwatch.cs" />
     <Compile Include="Support\PerfHistory.cs" />
     <Compile Include="Traits\AcceptsOre.cs" />
-    <Compile Include="Traits\Activities\Activity.cs" />
+    <Compile Include="Traits\Activities\IActivity.cs" />
     <Compile Include="Traits\Activities\DeliverOre.cs" />
     <Compile Include="Traits\Activities\DeployMcv.cs" />
     <Compile Include="Actor.cs" />
@@ -137,6 +137,7 @@
     <Compile Include="Graphics\TreeCache.cs" />
     <Compile Include="Traits\Activities\Harvest.cs" />
     <Compile Include="Traits\Activities\Move.cs" />
+    <Compile Include="Traits\Activities\Follow.cs" />
     <Compile Include="Traits\Activities\Turn.cs" />
     <Compile Include="Traits\AttackTurreted.cs" />
     <Compile Include="Traits\Building.cs" />

OpenRa.Game/Traits/AcceptsOre.cs

@@ -9,7 +9,7 @@ namespace OpenRa.Game.Traits
 	{
 		public AcceptsOre(Actor self)
 		{
-			if (!Game.skipMakeAnims)
+		//	if (!Game.skipMakeAnims)
 				Game.world.AddFrameEndTask(
 					w =>
 					{		/* create the free harvester! */

OpenRa.Game/Traits/Activities/DeliverOre.cs

@@ -5,9 +5,9 @@ using System.Text;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	class DeliverOre : Activity
+	class DeliverOre : IActivity
 	{
-		public Activity NextActivity { get; set; }
+		public IActivity NextActivity { get; set; }
 
 		bool isDone;
 		Actor refinery;

OpenRa.Game/Traits/Activities/DeployMcv.cs

@@ -5,9 +5,9 @@ using System.Text;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	class DeployMcv : Activity
+	class DeployMcv : IActivity
 	{
-		public Activity NextActivity { get; set; }
+		public IActivity NextActivity { get; set; }
 
 		public void Tick( Actor self, Mobile mobile )
 		{

OpenRa.Game/Traits/Activities/Follow.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits.Activities
+{
+	class Follow : IActivity
+	{
+		Actor Target;
+		int Range;
+
+		public Follow(Actor target, int range)
+		{
+			Target = target;
+			Range = range;
+		}
+
+		public IActivity NextActivity { get; set; }
+
+		public void Tick(Actor self, Mobile mobile)
+		{
+			if (Target.IsDead)
+			{
+				mobile.InternalSetActivity(NextActivity);
+				return;
+			}
+
+			if ((Target.Location - self.Location).LengthSquared >= Range * Range)
+			{
+				mobile.InternalSetActivity(new Move(Target, Range));
+				mobile.QueueActivity(this);
+			}
+		}
+
+		public void Cancel(Actor self, Mobile mobile) { }
+	}
+}

OpenRa.Game/Traits/Activities/Harvest.cs

@@ -5,9 +5,9 @@ using System.Text;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	class Harvest : Activity
+	class Harvest : IActivity
 	{
-		public Activity NextActivity { get; set; }
+		public IActivity NextActivity { get; set; }
 		bool isHarvesting = false;
 
 		public void Tick(Actor self, Mobile mobile)
@@ -85,12 +85,9 @@ namespace OpenRa.Game.Traits.Activities
 					return Game.PathFinder.FindPath(search);
 				}));
 			mobile.QueueActivity(new Harvest());
-
 			mobile.InternalSetActivity( NextActivity );
 		}
 
-		public void Cancel(Actor self, Mobile mobile)
+		public void Cancel(Actor self, Mobile mobile) { }
-		{
-		}
 	}
 }

OpenRa.Game/Traits/Activities/IActivity.cs

@@ -5,9 +5,9 @@ using System.Text;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	interface Activity
+	interface IActivity
 	{
-		Activity NextActivity { get; set; }
+		IActivity NextActivity { get; set; }
 		void Tick( Actor self, Mobile mobile );
 		void Cancel( Actor self, Mobile mobile );
 	}

OpenRa.Game/Traits/Activities/Move.cs

@@ -5,9 +5,9 @@ using OpenRa.Game.GameRules;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	class Move : Activity
+	class Move : IActivity
 	{
-		public Activity NextActivity { get; set; }
+		public IActivity NextActivity { get; set; }
 
 		int2? destination;
 		int nearEnough;

OpenRa.Game/Traits/Activities/Turn.cs

@@ -5,9 +5,9 @@ using System.Text;
 
 namespace OpenRa.Game.Traits.Activities
 {
-	class Turn : Activity
+	class Turn : IActivity
 	{
-		public Activity NextActivity { get; set; }
+		public IActivity NextActivity { get; set; }
 
 		public int desiredFacing;
 

OpenRa.Game/Traits/McvDeploy.cs

@@ -8,9 +8,7 @@ namespace OpenRa.Game.Traits
 {
 	class McvDeploy : IOrder
 	{
-		public McvDeploy(Actor self)
+		public McvDeploy(Actor self) { }
-		{
-		}
 
 		public Order Order(Actor self, int2 xy, bool lmb, Actor underCursor)
 		{

OpenRa.Game/Traits/Mobile.cs

@@ -18,7 +18,7 @@ namespace OpenRa.Game.Traits
 		public int facing;
 
 		public int Voice = Game.CosmeticRandom.Next(2);
-		Activity currentActivity;
+		IActivity currentActivity;
 
 		public Mobile(Actor self)
 		{
@@ -27,7 +27,7 @@ namespace OpenRa.Game.Traits
 			Game.UnitInfluence.Update( this );
 		}
 
-		public void QueueActivity( Activity nextActivity )
+		public void QueueActivity( IActivity nextActivity )
 		{
 			if( currentActivity == null )
 			{
@@ -42,7 +42,7 @@ namespace OpenRa.Game.Traits
 			act.NextActivity = nextActivity;
 		}
 
-		public void InternalSetActivity( Activity activity )
+		public void InternalSetActivity( IActivity activity )
 		{
 			currentActivity = activity;
 		}

OpenRa.Game/UnitOrders.cs

@@ -36,8 +36,7 @@ namespace OpenRa.Game
 						var range = Rules.WeaponInfo[weapon].Range;
 
 						mobile.QueueActivity(
-							new Traits.Activities.Move( order.TargetActor,
+							new Traits.Activities.Follow(order.TargetActor, Math.Max(0, (int)range - RangeTolerance)));
-								Math.Max( 0, (int)range - RangeTolerance ) ) );
 					}
 
 					order.Subject.traits.Get<AttackTurreted>().target = order.TargetActor;
@@ -49,6 +48,7 @@ namespace OpenRa.Game
 						break;	/* throw the order on the floor */
 
 					var mobile = order.Subject.traits.Get<Mobile>();
+					mobile.Cancel(order.Subject);
 					mobile.QueueActivity( new Traits.Activities.Turn( 96 ) );
 					mobile.QueueActivity( new Traits.Activities.DeployMcv() );
 					break;